It would be interesting to look at the first short-interest ratio report on GME. It's pretty obvious that some money manager(s) decided to short the stock after the company's earnings report on 3/11. I recall the pps opening down on 3/12, then rising to $21.90. The uptick provided the opportunity to short sellers.
I'm sure quite a number of stop loss orders were triggered over the past week. Let's not overlook the steep drop on low volume on several occasions.